Research progress on modification of lithium cobalt oxide cathode material for lithium ion batteries
Lithium cobalt oxide has received extensive attention in the application of lithium ion battery cathode materials.However,there are still some problems such as irreversible structural phase transition and adverse side reactions with electrolytes during the deintercalation process of lithium cobalt oxide,which leads to the rapid decay of battery capacity.Therefore,it is an important task to improve the energy density and cycle stability of lithium cobalt oxide cathode materials by modification technology.In this paper,the existing problems of lithium cobalt oxide and some methods of modification in recent years are reviewed,such as particle size optimization,bulk phase doping and surface modification,which can effectively improve the structural stability and battery performance of lithium cobalt oxide materials under high operating voltage.The research status of lithium cobalt oxide materials is summarized and prospected.
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